Mark Ryan, a former top US EPA attorney now in private practice, provides an insider’s view on the Clean Water Act and several important developments affecting the Clean Water Act. Apart from his outstanding analysis of three pending cases (Waters of the U.S. Rule, Water Transfer Rule, and Des Moines), Mark also fills us in on some general administrative law issues (the Regulatory Accountability Act of 2017) and his thoughts on how the Trump administration might handle these issues.